1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.165 2012/07/24 11:05:11 foxr Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29:
30:
31:
32: package Apache::lonplot;
33:
34: use strict;
35: use warnings FATAL=>'all';
36: no warnings 'uninitialized';
37: use Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41: use Apache::lonnet;
42: use LONCAPA;
43:
44:
45: use vars qw/$weboutputformat $version/;
46:
47:
48:
49: BEGIN {
50: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
51: #
52: # Determine the version of GNUPLOT
53: $weboutputformat = 'gif';
54: my $versionstring = `gnuplot --version 2>/dev/null`;
55: ($version) = ($versionstring =~ /^gnuplot ([\d.]+)/);
56: if ($version >= 4) {
57: $weboutputformat = 'png';
58: }
59:
60: }
61:
62:
63: =pod
64:
65: ##
66: ## Description of data structures:
67: ##
68: ## %plot %key %axis
69: ## --------------------------
70: ## height title color
71: ## width box xmin
72: ## bgcolor pos xmax
73: ## fgcolor ymin
74: ## transparent ymax
75: ## grid
76: ## border
77: ## font
78: ## align
79: ##
80: ## @labels: $labels[$i] = \%label
81: ## %label: text, xpos, ypos, justify
82: ##
83: ## @curves: $curves[$i] = \%curve
84: ## %curve: name, linestyle, ( function | data )
85: ##
86: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
87: ## [y1,y2,y3,y4] ]
88: ##
89:
90: ###################################################################
91: ## ##
92: ## Tests used in checking the validitity of input ##
93: ## ##
94: ###################################################################
95:
96: =cut
97:
98: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
99: # is longer than this, it will be truncated.
100:
101: my %linetypes = # For png use these linetypes.
102: (
103: solid => 1,
104: dashed => 0
105: );
106: my %ps_linetypes = # For ps the line types are different!
107: (
108: solid => 0,
109: dashed => 7
110: );
111:
112: my %linestyles =
113: (
114: lines => 2, # Maybe this will be used in the future
115: linespoints => 2, # to check on whether or not they have
116: dots => 2, # supplied enough <data></data> fields
117: points => 2, # to use the given line style. But for
118: steps => 2, # now there are more important things
119: fsteps => 2, # for me to deal with.
120: histeps => 2,
121: errorbars => 3,
122: xerrorbars => [3,4],
123: yerrorbars => [3,4],
124: xyerrorbars => [4,6],
125: boxes => 3,
126: filledcurves => 2,
127: vector => 4
128: );
129:
130: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
131: my $real_test =
132: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
133: my $pos_real_test =
134: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
135: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
136: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
137: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
138: my $sml_test = sub {$_[0]=~/^(\d+|small|medium|large)$/};
139: my $linestyle_test = sub {exists($linestyles{$_[0]})};
140: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
141:
142: my $arrowhead_test = sub{$_[0]=~/^(nohead|head|heads| )+$/};
143: my $arrowstyle_test= sub{$_[0]=~/^(filled|empty|nofilled)+$/};
144: my $degree_test = sub{&$pos_real_test($_[0]) && ($_[0] <= 360.0)};
145:
146: ###################################################################
147: ## ##
148: ## Attribute metadata ##
149: ## ##
150: ###################################################################
151: my @gnuplot_edit_order =
152: qw/alttag bgcolor fgcolor height width texwidth fontface font texfont
153: transparent grid samples
154: border align plotcolor plottype gridtype lmargin rmargin
155: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
156: pattern solid/;
157:
158: my $margin_choices = ['default',0..20];
159:
160: my %gnuplot_defaults =
161: (
162: alttag => {
163: default => 'dynamically generated plot',
164: test => $words_test,
165: description => 'Brief description of the plot',
166: edit_type => 'entry',
167: size => '40'
168: },
169: height => {
170: default => 300,
171: test => $int_test,
172: description => 'Height of image (pixels)',
173: edit_type => 'entry',
174: size => '10'
175: },
176: width => {
177: default => 400,
178: test => $int_test,
179: description => 'Width of image (pixels)',
180: edit_type => 'entry',
181: size => '10'
182: },
183: bgcolor => {
184: default => 'xffffff',
185: test => $color_test,
186: description => 'Background color of image (xffffff)',
187: edit_type => 'entry',
188: size => '10',
189: class => 'colorchooser'
190: },
191: fgcolor => {
192: default => 'x000000',
193: test => $color_test,
194: description => 'Foreground color of image (x000000)',
195: edit_type => 'entry',
196: size => '10',
197: class => 'colorchooser'
198: },
199: transparent => {
200: default => 'off',
201: test => $onoff_test,
202: description => 'Transparent image',
203: edit_type => 'onoff'
204: },
205: grid => {
206: default => 'on',
207: test => $onoff_test,
208: description => 'Display grid',
209: edit_type => 'onoff'
210: },
211: gridlayer => {
212: default => 'off',
213: test => $onoff_test,
214: description => 'Display grid front layer over filled boxes or filled curves',
215: edit_type => 'onoff'
216: },
217: box_border => {
218: default => 'noborder',
219: test => sub {$_[0]=~/^(noborder|border)$/},
220: description => 'Draw border for boxes',
221: edit_type => 'choice',
222: choices => ['border','noborder']
223: },
224: border => {
225: default => 'on',
226: test => $onoff_test,
227: description => 'Draw border around plot',
228: edit_type => 'onoff'
229: },
230: font => {
231: default => '9',
232: test => $sml_test,
233: description => 'Font size to use in web output (pts)',
234: edit_type => 'choice',
235: choices => [['5','5 (small)'],'6','7','8',['9','9 (medium)'],'10',['11','11 (large)'],'12','15']
236: },
237: fontface => {
238: default => 'sans-serif',
239: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
240: description => 'Type of font to use',
241: edit_type => 'choice',
242: choices => ['sans-serif','serif', 'classic']
243: },
244: samples => {
245: default => '100',
246: test => $int_test,
247: description => 'Number of samples for non-data plots',
248: edit_type => 'choice',
249: choices => ['100','200','500','1000','2000','5000']
250: },
251: align => {
252: default => 'middle',
253: test => sub {$_[0]=~/^(left|right|middle|center)$/},
254: description => 'Alignment for image in HTML',
255: edit_type => 'choice',
256: choices => ['left','right','middle']
257: },
258: texwidth => {
259: default => '93',
260: test => $int_test,
261: description => 'Width of plot when printed (mm)',
262: edit_type => 'entry',
263: size => '5'
264: },
265: texfont => {
266: default => '22',
267: test => $int_test,
268: description => 'Font size to use in TeX output (pts):',
269: edit_type => 'choice',
270: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
271: },
272: plotcolor => {
273: default => 'monochrome',
274: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
275: description => 'Color setting for printing:',
276: edit_type => 'choice',
277: choices => [qw/monochrome color colour/],
278: },
279: pattern => {
280: default => '',
281: test => $int_test,
282: description => 'Pattern value for boxes:',
283: edit_type => 'choice',
284: choices => [0,1,2,3,4,5,6]
285: },
286: solid => {
287: default => 0,
288: test => $real_test,
289: description => 'The density of fill style for boxes',
290: edit_type => 'entry',
291: size => '5'
292: },
293: fillstyle => {
294: default => 'empty',
295: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
296: description => 'Filled style for boxes:',
297: edit_type => 'choice',
298: choices => ['empty','solid','pattern']
299: },
300: plottype => {
301: default => 'Cartesian',
302: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
303: description => 'Plot type:',
304: edit_type => 'choice',
305: choices => ['Cartesian','Polar']
306: },
307: gridtype => {
308: default => 'Cartesian',
309: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
310: description => 'Grid type:',
311: edit_type => 'choice',
312: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
313: },
314: lmargin => {
315: default => 'default',
316: test => sub {$_[0]=~/^(default|\d+)$/},
317: description => 'Left margin width (pts):',
318: edit_type => 'choice',
319: choices => $margin_choices,
320: },
321: rmargin => {
322: default => 'default',
323: test => sub {$_[0]=~/^(default|\d+)$/},
324: description => 'Right margin width (pts):',
325: edit_type => 'choice',
326: choices => $margin_choices,
327: },
328: tmargin => {
329: default => 'default',
330: test => sub {$_[0]=~/^(default|\d+)$/},
331: description => 'Top margin width (pts):',
332: edit_type => 'choice',
333: choices => $margin_choices,
334: },
335: bmargin => {
336: default => 'default',
337: test => sub {$_[0]=~/^(default|\d+)$/},
338: description => 'Bottom margin width (pts):',
339: edit_type => 'choice',
340: choices => $margin_choices,
341: },
342: boxwidth => {
343: default => '',
344: test => $real_test,
345: description => 'Width of boxes, default is auto',
346: edit_type => 'entry',
347: size => '5'
348: },
349: major_ticscale => {
350: default => '1',
351: test => $real_test,
352: description => 'Size of major tic marks (plot coordinates)',
353: edit_type => 'entry',
354: size => '5'
355: },
356: minor_ticscale => {
357: default => '0.5',
358: test => $real_test,
359: description => 'Size of minor tic mark (plot coordinates)',
360: edit_type => 'entry',
361: size => '5'
362: },
363: );
364:
365: my %key_defaults =
366: (
367: title => {
368: default => '',
369: test => $words_test,
370: description => 'Title of key',
371: edit_type => 'entry',
372: size => '40'
373: },
374: box => {
375: default => 'off',
376: test => $onoff_test,
377: description => 'Draw a box around the key?',
378: edit_type => 'onoff'
379: },
380: pos => {
381: default => 'top right',
382: test => $key_pos_test,
383: description => 'Position of the key on the plot',
384: edit_type => 'choice',
385: choices => ['top left','top right','bottom left','bottom right',
386: 'outside','below']
387: }
388: );
389:
390: my %label_defaults =
391: (
392: xpos => {
393: default => 0,
394: test => $real_test,
395: description => 'X position of label (graph coordinates)',
396: edit_type => 'entry',
397: size => '10'
398: },
399: ypos => {
400: default => 0,
401: test => $real_test,
402: description => 'Y position of label (graph coordinates)',
403: edit_type => 'entry',
404: size => '10'
405: },
406: justify => {
407: default => 'left',
408: test => sub {$_[0]=~/^(left|right|center)$/},
409: description => 'justification of the label text on the plot',
410: edit_type => 'choice',
411: choices => ['left','right','center']
412: },
413: rotate => {
414: default => 0,
415: test => $real_test,
416: description => 'Rotation of label (degrees)',
417: edit_type => 'entry',
418: size => '10',
419: }
420: );
421:
422: my @tic_edit_order = ('location','mirror','start','increment','end',
423: 'minorfreq');
424: my %tic_defaults =
425: (
426: location => {
427: default => 'border',
428: test => sub {$_[0]=~/^(border|axis)$/},
429: description => 'Location of major tic marks',
430: edit_type => 'choice',
431: choices => ['border','axis']
432: },
433: mirror => {
434: default => 'on',
435: test => $onoff_test,
436: description => 'Mirror tics on opposite axis?',
437: edit_type => 'onoff'
438: },
439: start => {
440: default => '-10.0',
441: test => $real_test,
442: description => 'Start major tics at',
443: edit_type => 'entry',
444: size => '10'
445: },
446: increment => {
447: default => '1.0',
448: test => $real_test,
449: description => 'Place a major tic every',
450: edit_type => 'entry',
451: size => '10'
452: },
453: end => {
454: default => ' 10.0',
455: test => $real_test,
456: description => 'Stop major tics at ',
457: edit_type => 'entry',
458: size => '10'
459: },
460: minorfreq => {
461: default => '0',
462: test => $int_test,
463: description => 'Number of minor tics per major tic mark',
464: edit_type => 'entry',
465: size => '10'
466: },
467: rotate => {
468: default => 'off',
469: test => $onoff_test,
470: description => 'Rotate tic label by 90 degrees if on',
471: edit_type => 'onoff'
472: }
473: );
474:
475: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
476: my %axis_defaults =
477: (
478: color => {
479: default => 'x000000',
480: test => $color_test,
481: description => 'Color of grid lines (x000000)',
482: edit_type => 'entry',
483: size => '10',
484: class => 'colorchooser'
485: },
486: xmin => {
487: default => '-10.0',
488: test => $real_test,
489: description => 'Minimum x-value shown in plot',
490: edit_type => 'entry',
491: size => '10'
492: },
493: xmax => {
494: default => ' 10.0',
495: test => $real_test,
496: description => 'Maximum x-value shown in plot',
497: edit_type => 'entry',
498: size => '10'
499: },
500: ymin => {
501: default => '-10.0',
502: test => $real_test,
503: description => 'Minimum y-value shown in plot',
504: edit_type => 'entry',
505: size => '10'
506: },
507: ymax => {
508: default => ' 10.0',
509: test => $real_test,
510: description => 'Maximum y-value shown in plot',
511: edit_type => 'entry',
512: size => '10'
513: },
514: xformat => {
515: default => 'on',
516: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
517: description => 'X-axis number formatting',
518: edit_type => 'choice',
519: choices => ['on', 'off', '2e', '2f'],
520: },
521: yformat => {
522: default => 'on',
523: test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
524: description => 'Y-axis number formatting',
525: edit_type => 'choice',
526: choices => ['on', 'off', '2e', '2f'],
527: },
528:
529: xzero => {
530: default => 'off',
531: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
532: description => 'Show x-zero (y=0) axis',
533: edit_type => 'choice',
534: choices => ['off', 'line', 'thick-line', 'dotted'],
535: },
536:
537: yzero => {
538: default => 'off',
539: test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
540: description => 'Show y-zero (x=0) axis',
541: edit_type => 'choice',
542: choices => ['off', 'line', 'thick-line', 'dotted'],
543: },
544: );
545:
546:
547: my @curve_edit_order = ('color','name','linestyle','linewidth','linetype',
548: 'pointtype','pointsize','limit', 'arrowhead', 'arrowstyle',
549: 'arrowlength', 'arrowangle', 'arrowbackangle'
550: );
551:
552: my %curve_defaults =
553: (
554: color => {
555: default => 'x000000',
556: test => $color_test,
557: description => 'Color of curve (x000000)',
558: edit_type => 'entry',
559: size => '10',
560: class => 'colorchooser'
561: },
562: name => {
563: default => '',
564: test => $words_test,
565: description => 'Name of curve to appear in key',
566: edit_type => 'entry',
567: size => '20'
568: },
569: linestyle => {
570: default => 'lines',
571: test => $linestyle_test,
572: description => 'Plot with:',
573: edit_type => 'choice',
574: choices => [keys(%linestyles)]
575: },
576: linewidth => {
577: default => 1,
578: test => $int_test,
579: description => 'Line width (may not apply to all plot styles)',
580: edit_type => 'choice',
581: choices => [1,2,3,4,5,6,7,8,9,10]
582: },
583: linetype => {
584: default => 'solid',
585: test => sub {$_[0]=~/^(solid|dashed)$/},
586: description => 'Line type (may not apply to all plot styles)',
587: edit_type => 'choice',
588: choices => ['solid', 'dashed']
589: },
590: pointsize => {
591: default => 1,
592: test => $pos_real_test,
593: description => 'Point size (may not apply to all plot styles)',
594: edit_type => 'entry',
595: size => '5'
596: },
597: pointtype => {
598: default => 1,
599: test => $int_test,
600: description => 'Point type (may not apply to all plot styles)',
601: edit_type => 'choice',
602: choices => [0,1,2,3,4,5,6]
603: },
604: limit => {
605: default => 'closed',
606: test => sub {$_[0]=~/^(above|below|closed|x1|x2|y1|y2)$/},
607: description => 'Point to fill -- for filledcurves',
608: edit_type => 'choice',
609: choices => ['above', 'below', 'closed','x1','x2','y1','y2']
610: },
611: arrowhead => {
612: default => 'head',
613: test => $arrowhead_test,
614: description => 'Vector arrow head type',
615: edit_type => 'choice',
616: choices => ['nohead', 'head', 'heads']
617: },
618: arrowstyle => {
619: default => 'filled',
620: test => $arrowstyle_test,
621: description => 'Vector arrow head style',
622: edit_type => 'choice',
623: choices => ['filled', 'empty', 'nofilled']
624: },
625: arrowlength => {
626: default => 0.02,
627: test => $pos_real_test,
628: description => "Length of vector arrow (only applies to vector plots)",
629: edit_type => 'entry',
630: size => '5'
631: },
632: arrowangle => {
633: default => 10.0,
634: test => $degree_test,
635: description => 'Angle of arrow branches to arrow body (only applies to vector plots)',
636: edit_type => 'entry',
637: size => '5'
638: },
639:
640: arrowbackangle => {
641: default => 90.0,
642: test => $degree_test,
643: descripton => 'Angle of arrow back lines to branches.',
644: edit_type => 'entry',
645: size => '5'
646: }
647:
648: );
649:
650: ###################################################################
651: ## ##
652: ## parsing and edit rendering ##
653: ## ##
654: ###################################################################
655:
656: undef %Apache::lonplot::plot;
657: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
658:
659: my $current_tics; # Reference to the current tick hash
660:
661: sub start_gnuplot {
662: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
663: undef($title); undef($xlabel); undef($ylabel);
664: undef(@labels); undef(@curves);
665: undef(%xtics); undef(%ytics);
666: #
667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
668: my $result='';
669: &Apache::lonxml::register('Apache::lonplot',
670: ('title','xlabel','ylabel','key','axis','label','curve',
671: 'xtics','ytics'));
672: push (@Apache::lonxml::namespace,'lonplot');
673: if ($target eq 'web' || $target eq 'tex') {
674: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
675: $tagstack->[-1]);
676: } elsif ($target eq 'edit') {
677: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
678: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
679: \@gnuplot_edit_order)
680: .&Apache::edit::end_row()
681: .&Apache::edit::start_spanning_row();
682: } elsif ($target eq 'modified') {
683: my $constructtag=&Apache::edit::get_new_args
684: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
685:
686: if ($constructtag) {
687: #
688: # The color chooser does not prepent x to the color values
689: # Do that here:
690: #
691: foreach my $attribute ('bgcolor', 'fgcolor') {
692: my $value = $token->[2]{$attribute};
693: if (defined $value && !($value =~ /^x/)) {
694: $token->[2]{$attribute} = 'x' . $value;
695: }
696: }
697: $result = &Apache::edit::rebuild_tag($token);
698: }
699: }
700: return $result;
701: }
702:
703: sub end_gnuplot {
704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
705: pop @Apache::lonxml::namespace;
706: &Apache::lonxml::deregister('Apache::lonplot',
707: ('title','xlabel','ylabel','key','axis','label','curve'));
708: my $result = '';
709: my $randnumber;
710: my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
711:
712: # need to call rand everytime start_script would evaluate, as the
713: # safe space rand number generator and the global rand generator
714: # are not separate
715: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
716: $target eq 'answer') {
717: $randnumber=int(rand(1000));
718: }
719: if ($target eq 'web' || $target eq 'tex') {
720: &check_inputs(); # Make sure we have all the data we need
721: ##
722: ## Determine filename
723: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
724: '_'.time.'_'.$$.$randnumber.'_plot';
725: ## Write the plot description to the file
726: &write_gnuplot_file($tmpdir,$filename,$target);
727: $filename = &escape($filename);
728: ## return image tag for the plot
729: if ($target eq 'web') {
730: $result .= <<"ENDIMAGE";
731: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
732: width = "$Apache::lonplot::plot{'width'}"
733: height = "$Apache::lonplot::plot{'height'}"
734: align = "$Apache::lonplot::plot{'align'}"
735: alt = "$Apache::lonplot::plot{'alttag'}" />
736: ENDIMAGE
737: } elsif ($target eq 'tex') {
738: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
739: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
740: #might be inside the safe space, register the URL for later
741: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
742: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
743: $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
744: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
745: }
746: } elsif ($target eq 'edit') {
747: $result.=&Apache::edit::tag_end($target,$token);
748: }
749: return $result;
750: }
751:
752:
753: ##--------------------------------------------------------------- xtics
754: sub start_xtics {
755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
756: my $result='';
757: if ($target eq 'web' || $target eq 'tex') {
758: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
759: $tagstack->[-1]);
760: $current_tics = \%xtics;
761: &Apache::lonxml::register('Apache::lonplot', 'tic');
762: } elsif ($target eq 'edit') {
763: $result .= &Apache::edit::tag_start($target,$token,'xtics');
764: $result .= &edit_attributes($target,$token,\%tic_defaults,
765: \@tic_edit_order);
766: } elsif ($target eq 'modified') {
767: my $constructtag=&Apache::edit::get_new_args
768: ($token,$parstack,$safeeval,keys(%tic_defaults));
769: if ($constructtag) {
770: $result = &Apache::edit::rebuild_tag($token);
771: }
772: }
773: return $result;
774: }
775:
776: sub end_xtics {
777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
778: my $result = '';
779: if ($target eq 'web' || $target eq 'tex') {
780: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
781: } elsif ($target eq 'edit') {
782: $result.=&Apache::edit::tag_end($target,$token);
783: }
784: return $result;
785: }
786:
787: ##--------------------------------------------------------------- ytics
788: sub start_ytics {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
790: my $result='';
791: if ($target eq 'web' || $target eq 'tex') {
792: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
793: $tagstack->[-1]);
794: $current_tics = \%ytics;
795: &Apache::lonxml::register('Apache::lonplot', 'tic');
796: } elsif ($target eq 'edit') {
797: $result .= &Apache::edit::tag_start($target,$token,'ytics');
798: $result .= &edit_attributes($target,$token,\%tic_defaults,
799: \@tic_edit_order);
800: } elsif ($target eq 'modified') {
801: my $constructtag=&Apache::edit::get_new_args
802: ($token,$parstack,$safeeval,keys(%tic_defaults));
803: if ($constructtag) {
804: $result = &Apache::edit::rebuild_tag($token);
805: }
806: }
807: return $result;
808: }
809:
810: sub end_ytics {
811: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
812: my $result = '';
813: if ($target eq 'web' || $target eq 'tex') {
814: &Apache::lonxml::deregister('Apache::lonplot', 'tic');
815: } elsif ($target eq 'edit') {
816: $result.=&Apache::edit::tag_end($target,$token);
817: }
818: return $result;
819: }
820:
821:
822: ##----------------------------------------------------------------
823: #
824: # Tic handling:
825: # The <tic> tag allows users to specify exact Tic positions and labels
826: # for each axis. In this version we only support level 0 tics (major tic).
827: # Each tic has associated with it a position and a label
828: # $current_tics is a reference to the current tick description hash.
829: # We add elements to an array in that has: ticspecs whose elements
830: # are 'pos' - the tick position and 'label' - the tic label.
831: #
832:
833:
834: sub start_tic {
835: my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
836:
837: my $result = '';
838: if ($target eq 'web' || $target eq 'tex') {
839: my $tic_location = &Apache::lonxml::get_param('location', $parstack, $safeeval);
840: my $tic_label = &Apache::lonxml::get_all_text('/tic', $parser);
841:
842: # Tic location must e a real:
843:
844: if (!&$real_test($tic_location)) {
845: &Apache::lonxml::warning("Tic location: $tic_location must be a real number");
846: } else {
847:
848: if (!defined $current_tics->{'ticspecs'}) {
849: $current_tics->{'ticspecs'} = [];
850: }
851: my $ticspecs = $current_tics->{'ticspecs'};
852: push (@$ticspecs, {'pos' => $tic_location, 'label' => $tic_label});
853: }
854: }
855:
856: return $result;
857: }
858:
859: sub end_tic {
860: return '';
861: }
862:
863: ##-----------------------------------------------------------------font
864: my %font_properties =
865: (
866: 'classic' => {
867: face => 'classic',
868: file => 'DejaVuSansMono-Bold',
869: printname => 'Helvetica',
870: tex_no_file => 1,
871: },
872: 'sans-serif' => {
873: face => 'sans-serif',
874: file => 'DejaVuSans',
875: printname => 'DejaVuSans',
876: },
877: 'serif' => {
878: face => 'serif',
879: file => 'DejaVuSerif',
880: printname => 'DejaVuSerif',
881: },
882: );
883:
884: sub get_font {
885: my ($target) = @_;
886: my ($size, $selected_font);
887:
888: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
889: $selected_font = $font_properties{'classic'};
890: if ( $Apache::lonplot::plot{'font'} eq 'small') {
891: $size = '5';
892: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
893: $size = '9';
894: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
895: $size = '11';
896: } else {
897: $size = '9';
898: }
899: } else {
900: $size = $Apache::lonplot::plot{'font'};
901: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
902: }
903: if ($target eq 'tex' && defined($Apache::lonplot::plot{'texfont'})) {
904: # $selected_font = $font_properties{'classic'};
905: $size = $Apache::lonplot::plot{'texfont'};
906: }
907: return ($size, $selected_font);
908: }
909:
910: ##----------------------------------------------------------------- key
911: sub start_key {
912: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
913: my $result='';
914: if ($target eq 'web' || $target eq 'tex') {
915: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
916: $tagstack->[-1]);
917: } elsif ($target eq 'edit') {
918: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
919: $result .= &edit_attributes($target,$token,\%key_defaults);
920: } elsif ($target eq 'modified') {
921: my $constructtag=&Apache::edit::get_new_args
922: ($token,$parstack,$safeeval,keys(%key_defaults));
923: if ($constructtag) {
924: $result = &Apache::edit::rebuild_tag($token);
925: }
926: }
927: return $result;
928: }
929:
930: sub end_key {
931: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
932: my $result = '';
933: if ($target eq 'web' || $target eq 'tex') {
934: } elsif ($target eq 'edit') {
935: $result.=&Apache::edit::tag_end($target,$token);
936: }
937: return $result;
938: }
939:
940: sub parse_label {
941: my ($target,$text) = @_;
942: my $parser=HTML::LCParser->new(\$text);
943: my $result;
944: while (my $token=$parser->get_token) {
945: if ($token->[0] eq 'S') {
946: if ($token->[1] eq 'sub') {
947: $result .= '_{';
948: } elsif ($token->[1] eq 'sup') {
949: $result .= '^{';
950: } else {
951: $result .= $token->[4];
952: }
953: } elsif ($token->[0] eq 'E') {
954: if ($token->[1] eq 'sub'
955: || $token->[1] eq 'sup') {
956: $result .= '}';
957: } else {
958: $result .= $token->[2];
959: }
960: } elsif ($token->[0] eq 'T') {
961: $result .= &replace_entities($target,$token->[1]);
962: }
963: }
964: return $result;
965: }
966:
967: #
968: # Note that there are severe restrictions on font selection in the
969: # ps driver now. later in life Gnuplot is supposed to support
970: # utf-8 fonts in the posts script driver. When this happens,
971: # the tex entries with comments that include the word <FIX>
972: # should be changed to print the correct glyphs rather than some
973: # approximation or fallback of what is intended.
974:
975: my %lookup =
976: ( # Greek alphabet:
977:
978: '(Alpha|#913)' => {'tex' => '{/Symbol A}', 'web' => "\x{391}"},
979: '(Beta|#914)' => {'tex' => '{/Symbol B}', 'web' => "\x{392}"},
980: '(Chi|#935)' => {'tex' => '{/Symbol C}', 'web' => "\x{3A7}"},
981: '(Delta|#916)' => {'tex' => '{/Symbol D}', 'web' => "\x{394}"},
982: '(Epsilon|#917)' => {'tex' => '{/Symbol E}', 'web' => "\x{395}"},
983: '(Phi|#934)' => {'tex' => '{/Symbol F}', 'web' => "\x{3A6}"},
984: '(Gamma|#915)' => {'tex' => '{/Symbol G}', 'web' => "\x{393}"},
985: '(Eta|#919)' => {'tex' => '{/Symbol H}', 'web' => "\x{397}"},
986: '(Iota|#921)' => {'tex' => '{/Symbol I}', 'web' => "\x{399}"},
987: '(Kappa|#922)' => {'tex' => '{/Symbol K}', 'web' => "\x{39A}"},
988: '(Lambda|#923)' => {'tex' => '{/Symbol L}', 'web' => "\x{39B}"},
989: '(Mu|#924)' => {'tex' => '{/Symbol M}', 'web' => "\x{39C}"},
990: '(Nu|#925)' => {'tex' => '{/Symbol N}', 'web' => "\x{39D}"},
991: '(Omicron|#927)' => {'tex' => '{/Symbol O}', 'web' => "\x{39F}"},
992: '(Pi|#928)' => {'tex' => '{/Symbol P}', 'web' => "\x{3A0}"},
993: '(Theta|#920)' => {'tex' => '{/Symbol Q}', 'web' => "\x{398}"},
994: '(Rho|#929)' => {'tex' => '{/Symbol R}', 'web' => "\x{3A1}"},
995: '(Sigma|#931)' => {'tex' => '{/Symbol S}', 'web' => "\x{3A3}"},
996: '(Tau|#932)' => {'tex' => '{/Symbol T}', 'web' => "\x{3A4}"},
997: '(Upsilon|#933)' => {'tex' => '{/Symbol U}', 'web' => "\x{3A5}"},
998: '(Omega|#937)' => {'tex' => '{/Symbol W}', 'web' => "\x{3A9}"},
999: '(Xi|#926)' => {'tex' => '{/Symbol X}', 'web' => "\x{39E}"},
1000: '(Psi|#936)' => {'tex' => '{/Symbol Y}', 'web' => "\x{3A8}"},
1001: '(Zeta|#918)' => {'tex' => '{/Symbol Z}', 'web' => "\x{396}"},
1002: '(alpha|#945)' => {'tex' => '{/Symbol a}', 'web' => "\x{3B1}"},
1003: '(beta|#946)' => {'tex' => '{/Symbol b}', 'web' => "\x{3B2}"},
1004: '(chi|#967)' => {'tex' => '{/Symbol c}', 'web' => "\x{3C7}"},
1005: '(delta|#948)' => {'tex' => '{/Symbol d}', 'web' => "\x{3B4}"},
1006: '(epsilon|#949)' => {'tex' => '{/Symbol e}', 'web' => "\x{3B5}"},
1007: '(phi|#966)' => {'tex' => '{/Symbol f}', 'web' => "\x{3C6}"},
1008: '(gamma|#947)' => {'tex' => '{/Symbol g}', 'web' => "\x{3B3}"},
1009: '(eta|#951)' => {'tex' => '{/Symbol h}', 'web' => "\x{3B7}"},
1010: '(iota|#953)' => {'tex' => '{/Symbol i}', 'web' => "\x{3B9}"},
1011: '(kappa|#954)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BA}"},
1012: '(lambda|#955)' => {'tex' => '{/Symbol k}', 'web' => "\x{3BB}"},
1013: '(mu|#956)' => {'tex' => '{/Symbol m}', 'web' => "\x{3BC}"},
1014: '(nu|#957)' => {'tex' => '{/Symbol n}', 'web' => "\x{3BD}"},
1015: '(omicron|#959)' => {'tex' => '{/Symbol o}', 'web' => "\x{3BF}"},
1016: '(pi|#960)' => {'tex' => '{/Symbol p}', 'web' => "\x{3C0}"},
1017: '(theta|#952)' => {'tex' => '{/Symbol q}', 'web' => "\x{3B8}"},
1018: '(rho|#961)' => {'tex' => '{/Symbol r}', 'web' => "\x{3C1}"},
1019: '(sigma|#963)' => {'tex' => '{/Symbol s}', 'web' => "\x{3C3}"},
1020: '(tau|#964)' => {'tex' => '{/Symbol t}', 'web' => "\x{3C4}"},
1021: '(upsilon|#965)' => {'tex' => '{/Symbol u}', 'web' => "\x{3C5}"},
1022: '(omega|#969)' => {'tex' => '{/Symbol w}', 'web' => "\x{3C9}"},
1023: '(xi|#958)' => {'tex' => '{/Symbol x}', 'web' => "\x{3BE}"},
1024: '(psi|#968)' => {'tex' => '{/Symbol y}', 'web' => "\x{3C8}"},
1025: '(zeta|#950)' => {'tex' => '{/Symbol z}', 'web' => "\x{3B6}"},
1026: '(thetasym|#977)' => {'tex' => '{/Symbol \165}', 'web' => "\x{3d1}"},
1027: '(upsih|#978)' => {'tex' => '{/Symbol \241}', 'web' => "\x{3d2}"},
1028: '(piv|#982)' => {'tex' => '{/Symbol \166}', 'web' => "\x{3d6}"},
1029:
1030:
1031: # Punctuation:
1032:
1033: '(quot|#034)' => {'tex' => '\42', 'web' => '\42'},
1034: '(amp|#038)' => {'tex' => '\46', 'web' => '\46'},
1035: '(lt|#060)' => {'tex' => '\74', 'web' => '\74'},
1036: '(gt|#062)' => {'tex' => '\76', 'web' => '\76'},
1037: '#131' => {'tex' => '{/Symbol \246}', 'web' => "\x{192}"},
1038: '#132' => {'tex' => '{/Text \271}', 'web' => "\x{201e}"},
1039: '#133' => {'tex' => '{/Symbol \274}', 'web'=> "\x{2026}"},
1040: '#134' => {'tex' => '{/Text \262}', 'web' => "\x{2020}"},
1041: '#135' => {'tex' => '{/Text \263}', 'web' => "\x{2021}"},
1042: '#136' => {'tex' => '\\\\^', 'web' => '\\\\^'},
1043: '#137' => {'tex' => '%o', 'web' => "\x{2030}"}, # Per Mille <FIX>
1044: '#138' => {'tex' => 'S', 'web' => "\x{160}"}, # S-Caron <FIX>
1045: '#139' => {'tex' => '<', 'web' => '<'},
1046: '#140' => {'tex' => 'AE', 'web' => "\x{152}"}, # AE ligature <FIX>
1047: '#145' => {'tex' => '\140', 'web' => "\x{2018}"},
1048: '#146' => {'tex' => '\47', 'web' => "\x{2019}"},
1049: '#147' => {'tex' => '\140\140', 'web' => "\x{201c}"}, # Left " <FIX>
1050: '#148' => {'tex' => '\47\47', 'web' => '\\"'}, # Right " <FIX>
1051: '#149' => {'tex' => '{/Symbol \267}', 'web' => "\x{2022}"},
1052: '#150' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash
1053: '#151' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash
1054: '#152' => {'tex' => '\\\\~', 'web' => '\\\\~'},
1055: '#153' => {'tex' => '{/Symbol \324}', 'web' => "\x{2122}"}, # trademark
1056:
1057: # Accented letters, and other furreign language glyphs.
1058:
1059: '#154' => {'tex' => 's', 'web' => "\x{161}"}, # small s-caron no ps.
1060: '#155' => {'tex' => '>', 'web' => '\76'}, # >
1061: '#156' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.<FIX>
1062: '#159', => {'tex' => 'Y', 'web' => "\x{178}"}, # Y-umlaut - can't print <FIX>
1063: '(nbsp|#160)' => {'tex' => ' ', 'web' => ' '}, # non breaking space.
1064: '(iexcl|#161)' => {'tex' => '{/Text \241}', 'web' => "\x{a1}"}, # inverted !
1065: '(cent|#162)' => {'tex' => '{/Text \242}', 'web' => "\x{a2}"}, # Cent currency.
1066: '(pound|#163)' => {'tex' => '{/Text \243}', 'web' => "\x{a3}"}, # GB Pound currency.
1067: '(curren|#164)' => {'tex' => '{/ZapfDingbats \161}','web' => "\x{a4}"}, # Generic currency symb. <FIX>
1068: '(yen|#165)' => {'tex' => '{/Text \245}', 'web' => "\x{a5}"}, # Yen currency.
1069: '(brvbar|#166)' => {'tex' => '{/Symbol \174}', 'web' => "\x{a6}"}, # Broken vert bar no print.
1070: '(sect|#167)' => {'tex' => '{\247}', 'web' => "\x{a7}"}, # Section symbol.
1071: '(uml|#168)' => {'tex' => '{\250}', 'web' => "\x{a8}"}, # 'naked' umlaut.
1072: '(copy|#169)' => {'tex' => '{/Symbol \343}', 'web' => "\x{a9}"}, # Copyright symbol.
1073: '(ordf|#170)' => {'tex' => '{/Text \343}', 'web' => "\x{aa}"}, # Feminine ordinal.
1074: '(laquo|#171)' => {'tex' => '{/Text \253}', 'web' => "\x{ab}"}, # << quotes.
1075: '(not|#172)' => {'tex' => '\254', 'web' => "\x{ac}"}, # Logical not.
1076: '(shy|#173)' => {'tex' => '\255', 'web' => "\x{ad}"}, # soft hyphen.
1077: '(reg|#174)' => {'tex' => '{/Symbol \342}', 'web' => "\x{ae}"}, # Registered tm.
1078: '(macr|#175)' => {'tex' => '^{\255}', 'web' => "\x{af}"}, # 'naked' macron (overbar).
1079: '(deg|#176)' => {'tex' => '{/Text \260}', 'web' => "\x{b0}"}, # Degree symbo..`
1080: '(plusmn|#177)' => {'tex' => '{/Symbol \261}', 'web' => "\x{b1}"}, # +/- symbol.
1081: '(sup2|#178)' => {'tex' => '^2', 'web' => "\x{b2}"}, # Superscript 2.
1082: '(sup3|#179)' => {'tex' => '^3', 'web' => "\x{b3}"}, # Superscript 3.
1083: '(acute|#180)' => {'tex' => '{/Text \222}', 'web' => "\x{b4}"}, # 'naked' acute accent.
1084: '(micro|#181)' => {'tex' => '{/Symbol \155}', 'web' => "\x{b5}"}, # Micro (small mu).
1085: '(para|#182)' => {'tex' => '{/Text \266}', 'web' => "\x{b6}"}, # Paragraph symbol.
1086: '(middot|#183)' => {'tex' => '\267', 'web' => "\x{b7}"}, # middle dot
1087: '(cedil|#184)' => {'tex' => '\233', 'web' => "\x{b8}"}, # 'naked' cedilla.
1088: '(sup1|#185)' => {'tex' => '^1', 'web' => "\x{b9}"}, # superscript 1.
1089: '(ordm|#186)' => {'tex' => '{\260}', 'web' => "\x{ba}"}, # masculine ordinal.
1090: '(raquo|#187)', => {'tex' => '\273', 'web' => "\x{bb}"}, # Right angle quotes.
1091: '(frac14|#188)' => {'tex' => '\274', 'web' => "\x{bc}"}, # 1/4.
1092: '(frac12|#189)' => {'tex' => '\275', 'web' => "\x{bd}"}, # 1/2.
1093: '(frac34|#190)' => {'tex' => '\276', 'web' => "\x{be}"}, # 3/4
1094: '(iquest|#191)' => {'tex' => '{/Text \277}', 'web' => "\x{bf}"}, # Inverted ?
1095: '(Agrave|#192)' => {'tex' => '\300', 'web' => "\x{c0}"}, # A Grave.
1096: '(Aacute|#193)' => {'tex' => '\301', 'web' => "\x{c1}"}, # A Acute.
1097: '(Acirc|#194)' => {'tex' => '\302', 'web' => "\x{c2}"}, # A Circumflex.
1098: '(Atilde|#195)' => {'tex' => '\303', 'web' => "\x{c3}"}, # A tilde.
1099: '(Auml|#196)' => {'tex' => '\304', 'web' => "\x{c4}"}, # A umlaut.
1100: '(Aring|#197)' => {'tex' => '\305', 'web' => "\x{c5}"}, # A ring.
1101: '(AElig|#198)' => {'tex' => '\306', 'web' => "\x{c6}"}, # AE ligature.
1102: '(Ccedil|#199)' => {'tex' => '\307', 'web' => "\x{c7}"}, # C cedilla
1103: '(Egrave|#200)' => {'tex' => '\310', 'web' => "\x{c8}"}, # E Accent grave.
1104: '(Eacute|#201)' => {'tex' => '\311', 'web' => "\x{c9}"}, # E acute accent.
1105: '(Ecirc|#202)' => {'tex' => '\312', 'web' => "\x{ca}"}, # E Circumflex.
1106: '(Euml|#203)' => {'tex' => '\313', 'web' => "\x{cb}"}, # E umlaut.
1107: '(Igrave|#204)' => {'tex' => '\314', 'web' => "\x{cc}"}, # I grave accent.
1108: '(Iacute|#205)' => {'tex' => '\315', 'web' => "\x{cd}"}, # I acute accent.
1109: '(Icirc|#206)' => {'tex' => '\316', 'web' => "\x{ce}"}, # I circumflex.
1110: '(Iuml|#207)' => {'tex' => '\317', 'web' => "\x{cf}"}, # I umlaut.
1111: '(ETH|#208)' => {'tex' => '\320', 'web' => "\x{d0}"}, # Icelandic Cap eth.
1112: '(Ntilde|#209)' => {'tex' => '\321', 'web' => "\x{d1}"}, # Ntilde (enyan).
1113: '(Ograve|#210)' => {'tex' => '\322', 'web' => "\x{d2}"}, # O accent grave.
1114: '(Oacute|#211)' => {'tex' => '\323', 'web' => "\x{d3}"}, # O accent acute.
1115: '(Ocirc|#212)' => {'tex' => '\324', 'web' => "\x{d4}"}, # O circumflex.
1116: '(Otilde|#213)' => {'tex' => '\325', 'web' => "\x{d5}"}, # O tilde.
1117: '(Ouml|#214)' => {'tex' => '\326', 'web' => "\x{d6}"}, # O umlaut.
1118: '(times|#215)' => {'tex' => '\327', 'web' => "\x{d7}"}, # Times symbol.
1119: '(Oslash|#216)' => {'tex' => '\330', 'web' => "\x{d8}"}, # O slash.
1120: '(Ugrave|#217)' => {'tex' => '\331', 'web' => "\x{d9}"}, # U accent grave.
1121: '(Uacute|#218)' => {'tex' => '\332', 'web' => "\x{da}"}, # U accent acute.
1122: '(Ucirc|#219)' => {'tex' => '\333', 'web' => "\x{db}"}, # U circumflex.
1123: '(Uuml|#220)' => {'tex' => '\334', 'web' => "\x{dc}"}, # U umlaut.
1124: '(Yacute|#221)' => {'tex' => '\335', 'web' => "\x{dd}"}, # Y accent acute.
1125: '(THORN|#222)' => {'tex' => '\336', 'web' => "\x{de}"}, # Icelandic thorn.
1126: '(szlig|#223)' => {'tex' => '\337', 'web' => "\x{df}"}, # German sharfes s.
1127: '(agrave|#224)' => {'tex' => '\340', 'web' => "\x{e0}"}, # a accent grave.
1128: '(aacute|#225)' => {'tex' => '\341', 'web' => "\x{e1}"}, # a grave.
1129: '(acirc|#226)' => {'tex' => '\342', 'web' => "\x{e2}"}, # a circumflex.
1130: '(atilde|#227)' => {'tex' => '\343', 'web' => "\x{e3}"}, # a tilde.
1131: '(auml|#228)' => {'tex' => '\344', 'web' => "\x{e4}"}, # a umlaut
1132: '(aring|#229)' => {'tex' => '\345', 'web' => "\x{e5}"}, # a ring on top.
1133: '(aelig|#230)' => {'tex' => '\346', 'web' => "\x{e6}"}, # ae ligature.
1134: '(ccedil|#231)' => {'tex' => '\347', 'web' => "\x{e7}"}, # C cedilla
1135: '(egrave|#232)' => {'tex' => '\350', 'web' => "\x{e8}"}, # e accent grave.
1136: '(eacute|#233)' => {'tex' => '\351', 'web' => "\x{e9}"}, # e accent acute.
1137: '(ecirc|#234)' => {'tex' => '\352', 'web' => "\x{ea}" }, # e circumflex.
1138: '(euml|#235)' => {'tex' => '\353', 'web' => "\x{eb}"}, # e umlaut.
1139: '(igrave|#236)' => {'tex' => '\354', 'web' => "\x{ec}"}, # i grave.
1140: '(iacute|#237)' => {'tex' => '\355', 'web' => "\x{ed}"}, # i acute.
1141: '(icirc|#238)' => {'tex' => '\356', 'web' => "\x{ee}"}, # i circumflex.
1142: '(iuml|#239)' => {'tex' => '\357', 'web' => "\x{ef}"}, # i umlaut.
1143: '(eth|#240)' => {'tex' => '\360', 'web' => "\x{f0}"}, # Icelandic eth.
1144: '(ntilde|#241)' => {'tex' => '\361', 'web' => "\x{f1}"}, # n tilde.
1145: '(ograve|#242)' => {'tex' => '\362', 'web' => "\x{f2}"}, # o grave.
1146: '(oacute|#243)' => {'tex' => '\363', 'web' => "\x{f3}"}, # o acute.
1147: '(ocirc|#244)' => {'tex' => '\364', 'web' => "\x{f4}"}, # o circumflex.
1148: '(otilde|#245)' => {'tex' => '\365', 'web' => "\x{f5}"}, # o tilde.
1149: '(ouml|#246)' => {'tex' => '\366', 'web' => "\x{f6}"}, # o umlaut.
1150: '(divide|#247)' => {'tex' => '\367', 'web' => "\x{f7}"}, # division symbol
1151: '(oslash|#248)' => {'tex' => '\370', 'web' => "\x{f8}"}, # o slashed.
1152: '(ugrave|#249)' => {'tex' => '\371', 'web' => "\x{f9}"}, # u accent grave.
1153: '(uacute|#250)' => {'tex' => '\372', 'web' => "\x{fa}"}, # u acute.
1154: '(ucirc|#251)' => {'tex' => '\373', 'web' => "\x{fb}"}, # u circumflex.
1155: '(uuml|#252)' => {'tex' => '\374', 'web' => "\x{fc}"}, # u umlaut.
1156: '(yacute|#253)' => {'tex' => '\375', 'web' => "\x{fd}"}, # y acute accent.
1157: '(thorn|#254)' => {'tex' => '\376', 'web' => "\x{fe}"}, # small thorn (icelandic).
1158: '(yuml|#255)' => {'tex' => '\377', 'web' => "\x{ff}"}, # y umlaut.
1159:
1160: # Latin extended A entities:
1161:
1162: '(OElig|#338)' => {'tex' => '{/Text \326}', 'web' => "\x{152}"}, # OE ligature.
1163: '(oelig|#339)' => {'tex' => '{/Text \366}', 'web' => "\x{153}"}, # oe ligature.
1164: '(Scaron|#352)' => {'tex' => 'S', 'web' => "\x{160}"}, # S caron no printable.
1165: '(scaron|#353)' => {'tex' => 's', 'web' => "\x{161}"}, # s caron no printable.
1166: '(Yuml|#376)' => {'tex' => 'Y', 'web' => "\x{178}"}, # Y umlaut - no printable.
1167:
1168: # Latin extended B.
1169:
1170: '(fnof|#402)' => {'tex' =>'{/Symbol \246}', 'web' => "\x{192}"}, # f with little hook.
1171:
1172: # Standalone accents:
1173:
1174: '(circ|#710)' => {'tex' => '^', 'web' => '^'}, # circumflex.
1175: '(tilde|#732)' => {'tex' => '~', 'web' => '~'}, # tilde.
1176:
1177: # General punctuation. We're not able to make a distinction between
1178: # the various length spacings in the print version. (e.g. en/em/thin).
1179: # the various joiners will be empty strings in the print version too.
1180:
1181:
1182: '(ensp|#8194)' => {'tex' => ' ', 'web' => "\x{2002}"}, # en space.
1183: '(emsp|#8195)' => {'tex' => ' ', 'web' => "\x{2003}"}, # em space.
1184: '(thinsp|#8201)' => {'tex' => ' ', 'web' => "\x{2009}"}, # thin space.
1185: '(zwnj|#8204)' => {'tex' => ' ', 'web' => "\x{200c}"}, # Zero width non joiner.
1186: '(zwj|#8205)' => {'tex' => ' ', 'web' => "\x{200d}"}, # Zero width joiner.
1187: '(lrm|#8206)' => {'tex' => ' ', 'web' => "\x{200e}"}, # Left to right mark
1188: '(rlm|#8207)' => {'tex' => ' ', 'web' => "\x{200f}"}, # right to left mark.
1189: '(ndash|#8211)' => {'tex' => '{/Text \55}', 'web' => "\x{2013}"}, # en dash.
1190: '(mdash|#8212)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2014}"}, # em dash.
1191: '(lsquo|#8216)' => {'tex' => '{/Text \140}', 'web' => "\x{2018}"}, # Left single quote.
1192: '(rsquo|#8217)' => {'tex' => '\47', 'web' => "\x{2019}"}, # Right single quote.
1193: '(sbquo|#8218)' => {'tex' => '\54', 'web' => "\x{201a}"}, # Single low-9 quote.
1194: '(ldquo|#8220)' => {'tex' => '\42', 'web' => "\x{201c}"}, # Left double quote.
1195: '(rdquo|#8221)' => {'tex' => '\42', 'web' => "\x{201d}"}, # Right double quote.
1196: '(bdquo|#8222)' => {'tex' => ',', 'web' => "\x{201e}"}, # Double low-9 quote.
1197: '(dagger|#8224)' => {'tex' => '+', 'web' => "\x{2020}"}, # Is this a dagger I see before me now?
1198: '(Dagger|#8225)' => {'tex' => '\261', 'web' => "\x{2021}"}, # it's handle pointing towards my heart?
1199: '(bull|#8226)' => {'tex' => '\267', 'web' => "\x{2022}"}, # Bullet.
1200: '(hellep|#8230)' => {'tex' => '{/Symbol \274}', 'web' => "\x{2026}"}, # Ellipses.
1201: '(permil|#8240)' => {'tex' => '%_o', 'web' => "\x{2031}"}, # Per mille.
1202: '(prime|#8242)' => {'tex' => '\264', 'web' => "\x{2032}"}, # Prime.
1203: '(Prime|#8243)' => {'tex' => '{/Symbol \262}', 'web' => "\x{2033}"}, # double prime.
1204: '(lsaquo|#8249)' => {'tex' => '<', 'web' => "\x{2039}"}, # < quote.
1205: '(rsaquo|#8250)' => {'tex' => '\74', 'web' => "\x{203a}"}, # > quote.
1206: '(oline|#8254)' => {'tex' => '{/Symbol \140}', 'web' => "\x{203e}"}, # Overline.
1207: '(frasl|#8260)' => {'tex' => '/', 'web' => "\x{2044}"}, # Fraction slash.
1208: '(euro|#8364)' => {'tex' => '{/Symbol \240}', 'web' => "\x{20ac}"}, # Euro currency.
1209:
1210: # Letter like symbols.
1211:
1212: '(weierp|#8472)' => {'tex' => '{/Symbol \303}', 'web' => "\x{2118}"}, # Power set symbol
1213: '(image|#8465)' => {'tex' => '{/Symbol \301}', 'web' => "\x{2111}"}, # Imaginary part
1214: '(real|#8476)' => {'tex' => '{/Symbol \302}', 'web' => "\x{211c}"}, # Real part.
1215: '(trade|#8482)' => {'tex' => '{/Symbol \344}', 'web' => "\x{2122}"}, # trademark symbol.
1216: '(alefsym|#8501)' => {'tex' => '{/Symbol \300}', 'web' => "\x{2135}"}, # Hebrew alef.
1217:
1218: # Arrows of various types and directions.
1219: '(larr|#8592)' => {'tex' => '{/Symbol \254}', 'web' => "\x{2190}"}, # <--
1220: '(uarr|#8593)' => {'tex' => '{/Symbol \255}', 'web' => "\x{2191}"}, # up arrow.
1221: '(rarr|#8594)' => {'tex' => '{/Symbol \256}', 'web' => "\x{2192}"}, # -->
1222: '(darr|#8595)' => {'tex' => '{/Symbol \257}', 'web' => "\x{2193}"}, # down arrow.
1223: '(harr|#8596)' => {'tex' => '{/Symbol \253}', 'web' => "\x{2194}"}, # <-->
1224: '(crarr|#8629)' => {'tex' => '{/Symbol \277}', 'web' => "\x{21b5}"}, # corner arrow down and right.
1225: '(lArr|#8656)' => {'tex' => '{/Symbol \334}', 'web' => "\x{21d0}"}, # <==
1226: '(uArr|#8657)' => {'tex' => '{/Symbol \335}', 'web' => "\x{21d1}"}, # Up double arrow.
1227: '(rArr|#8658)' => {'tex' => '{/Symbol \336}', 'web' => "\x{21d2}"}, # ==>
1228: '(dArr|#8659)' => {'tex' => '{/Symbol \337}', 'web' => "\x{21d3}"}, # Down double arrow.
1229: '(hArr|#8660)' => {'tex' => '{/Symbol \333}', 'web' => "\x{21d4}"}, # <==>
1230:
1231: # Mathematical operators. For some of these we do the best we can in printing.
1232:
1233: '(forall|#8704)' => {'tex' => '{/Symbol \42}', 'web' => "\x{2200}"}, # For all.
1234: '(part|#8706)' => {'tex' => '{/Symbol d}', 'web' => "\x{2202}"}, # partial derivative
1235: '(exist|#8707)' => {'tex' => '{/Symbol \44}', 'web' => "\x{2203}"}, # There exists.
1236: '(empty|#8709)' => {'tex' => '{/Symbol \306}', 'web' => "\x{2205}"}, # Null set.
1237: '(nabla|#8711)' => {'tex' => '{/Symbol \321}', 'web' => "\x{2207}"}, # Gradient e.g.
1238: '(isin|#8712)' => {'tex' => '{/Symbol \316}', 'web' => "\x{2208}"}, # Element of the set.
1239: '(notin|#8713)' => {'tex' => '{/Symbol \317}', 'web' => "\x{2209}"}, # Not an element of
1240: '(ni|#8715)' => {'tex' => '{/Symbol \47}', 'web' => "\x{220b}"}, # Contains as a member
1241: '(prod|#8719)' => {'tex' => '{/Symbol \325}', 'web' => "\x{220f}"}, # Product
1242: '(sum|#8721)' => {'tex' => '{/Symbol \345}', 'web' => "\x{2211}"}, # Sum of.
1243: '(minus|#8722)' => {'tex' => '{/Symbol \55}', 'web' => "\x{2212}"}, # - sign.
1244: '(lowast|#8727)' => {'tex' => '*', 'web' => "\x{2217}"}, # *
1245: '(radic|#8730)' => {'tex' => '{/Symbol \326}', 'web' => "\x{221a}"}, # Square root.
1246: '(prop|#8733)' => {'tex' => '{/Symbol \265}', 'web' => "\x{221d}"}, # Proportional to.
1247: '(infin|#8734)' => {'tex' => '{/Symbol \245}', 'web' => "\x{221e}"}, # Infinity.
1248: '(ang|#8736)' => {'tex' => '{/Symbol \320}', 'web' => "\x{2220}"}, # Angle .
1249: '(and|#8743)' => {'tex' => '{/Symbol \331}', 'web' => "\x{2227}"}, # Logical and.
1250: '(or|#8744)' => {'tex' => '{/Symbol \332}', 'web' => "\x{2228}"}, # Logical or.
1251: '(cap|#8745)' => {'tex' => '{/Symbol \307}', 'web' => "\x{2229}"}, # Set intersection.
1252: '(cup|#8746)' => {'tex' => '{/Symbol \310}', 'web' => "\x{222a}"}, # Set union.
1253: '(int|8747)' => {'tex' => '{/Symbol \362}', 'web' => "\x{222b}"}, # Integral.
1254:
1255: # Some gnuplot guru will have to explain to me why the next three
1256: # require the extra slashes... else they print very funkily.
1257:
1258: '(there4|#8756)' => {'tex' => '{/Symbol \\\134}', 'web' => "\x{2234}"}, # Therefore triple dots.
1259: '(sim|#8764)' => {'tex' => '\\\176', 'web' => "\x{223c}"}, # Simlar to.
1260: '(cong|#8773)' => {'tex' => '{/Symbol \\\100}','web' => "\x{2245}"}, # Congruent to/with.
1261:
1262: '(asymp|#8776)' => {'tex' => '{/Symbol \273}', 'web' => "\x{2248}"}, # Asymptotic to.
1263: '(ne|#8800)' => {'tex' => '{/Symbol \271}', 'web' => "\x{2260}"}, # not equal to.
1264: '(equiv|#8801)' => {'tex' => '{/Symbol \272}', 'web' => "\x{2261}"}, # Equivalent to.
1265: '(le|8804)' => {'tex' => '{/Symbol \243}', 'web' => "\x{2264}"}, # Less than or equal to.
1266: '(ge|8805)' => {'tex' => '{/Symbol \263}', 'web' => "\x{2265}"}, # Greater than or equal to
1267: '(sub|8834)' => {'tex' => '{/Symbol \314}', 'web' => "\x{2282}"}, # Subset of.
1268: '(sup|8835)' => {'tex' => '{/Symbol \311}', 'web' => "\x{2283}"}, # Super set of.
1269: '(nsub|8836)' => {'tex' => '{/Symbol \313}', 'web' => "\x{2284}"}, # not subset of.
1270: '(sube|8838)' => {'tex' => '{/Symbol \315}', 'web' => "\x{2286}"}, # Subset or equal.
1271: '(supe|8839)' => {'tex' => '{/Symbol \312}', 'web' => "\x{2287}"}, # Superset or equal
1272: '(oplus|8853)' => {'tex' => '{/Symbol \305}', 'web' => "\x{2295}"}, # O with plus inside
1273: '(otimes|8855)' => {'tex' => '{/Symbol \304}', 'web' => "\x{2297}"}, # O with times.
1274: '(perp|8869)' => {'tex' => '{/Symbol \136}', 'web' => "\x{22a5}"}, # Perpendicular.
1275: '(sdot|8901)' => {'tex' => '{/Symbol \227}', 'web' => "\x{22c5}"}, # Dot operator.
1276:
1277: # Misc. technical symbols:
1278:
1279: '(lceil|8698)' => {'tex' => '{/Symbol \351}', 'web' => "\x{2308}"}, # Left ceiling.
1280: '(rceil|8969)' => {'tex' => '{/Symbol \371}', 'web' => "\x{2309}"}, # Right ceiling.
1281: '(lfloor|8970)' => {'tex' => '{/Symbol \353}', 'web' => "\x{230a}"}, # Left floor.
1282: '(rfloor|8971)' => {'tex' => '{/Symbol \373}', 'web' => "\x{230b}"}, # Right floor.
1283:
1284: # The gnuplot png font evidently does not have the big angle brackets at
1285: # positions 0x2329, 0x232a so use ordinary brackets.
1286:
1287: '(lang|9001)' => {'tex' => '{/Symbol \341}', 'web' => '<'}, # Left angle bracket.
1288: '(rang|9002)' => {'tex' => '{/Symbol \361}', 'web' => '>'}, # Right angle bracket.
1289:
1290: # Gemoetric shapes.
1291:
1292: '(loz|9674)' => {'tex' => '{/Symbol \340}', 'web' => "\x{25ca}"}, # Lozenge.
1293:
1294: # Misc. symbols
1295:
1296: '(spades|9824)' => {'tex' => '{/Symbol \252}', 'web' => "\x{2660}"},
1297: '(clubs|9827)' => {'tex' => '{/Symbol \247}', 'web' => "\x{2663}"},
1298: '(hearts|9829)' => {'tex' => '{/Symbol \251}', 'web' => "\x{2665}"},
1299: '(diams|9830)' => {'tex' => '{/Symbol \250}', 'web' => "\x{2666}"}
1300:
1301: );
1302:
1303:
1304: sub replace_entities {
1305: my ($target,$text) = @_;
1306: $text =~ s{([_^~\{\}]|\\\\)}{\\\\$1}g;
1307: while (my ($re, $replace) = each(%lookup)) {
1308: my $repl = $replace->{$target};
1309: $text =~ s/&$re;/$replace->{$target}/g;
1310: }
1311: $text =~ s{(&)}{\\\\$1}g;
1312: return $text;
1313: }
1314:
1315: ##------------------------------------------------------------------- title
1316: sub start_title {
1317: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1318: my $result='';
1319: if ($target eq 'web' || $target eq 'tex') {
1320: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1321: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1322: $title =~ s/\n/ /g;
1323: if (length($title) > $max_str_len) {
1324: $title = substr($title,0,$max_str_len);
1325: }
1326: $title = &parse_label($target,$title);
1327: } elsif ($target eq 'edit') {
1328: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1329: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1330: $result.=&Apache::edit::editline('',$text,'',60);
1331: } elsif ($target eq 'modified') {
1332: $result.=&Apache::edit::rebuild_tag($token);
1333: $result.=&Apache::edit::modifiedfield("/title",$parser);
1334: }
1335: return $result;
1336: }
1337:
1338: sub end_title {
1339: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1340: my $result = '';
1341: if ($target eq 'web' || $target eq 'tex') {
1342: } elsif ($target eq 'edit') {
1343: $result.=&Apache::edit::tag_end($target,$token);
1344: }
1345: return $result;
1346: }
1347: ##------------------------------------------------------------------- xlabel
1348: sub start_xlabel {
1349: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1350: my $result='';
1351: if ($target eq 'web' || $target eq 'tex') {
1352: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1353: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1354: $xlabel =~ s/\n/ /g;
1355: if (length($xlabel) > $max_str_len) {
1356: $xlabel = substr($xlabel,0,$max_str_len);
1357: }
1358: $xlabel = &parse_label($target,$xlabel);
1359: } elsif ($target eq 'edit') {
1360: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1361: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1362: $result.=&Apache::edit::editline('',$text,'',60);
1363: } elsif ($target eq 'modified') {
1364: $result.=&Apache::edit::rebuild_tag($token);
1365: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1366: }
1367: return $result;
1368: }
1369:
1370: sub end_xlabel {
1371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1372: my $result = '';
1373: if ($target eq 'web' || $target eq 'tex') {
1374: } elsif ($target eq 'edit') {
1375: $result.=&Apache::edit::tag_end($target,$token);
1376: }
1377: return $result;
1378: }
1379:
1380: ##------------------------------------------------------------------- ylabel
1381: sub start_ylabel {
1382: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1383: my $result='';
1384: if ($target eq 'web' || $target eq 'tex') {
1385: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1386: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1387: $ylabel =~ s/\n/ /g;
1388: if (length($ylabel) > $max_str_len) {
1389: $ylabel = substr($ylabel,0,$max_str_len);
1390: }
1391: $ylabel = &parse_label($target,$ylabel);
1392: } elsif ($target eq 'edit') {
1393: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1394: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1395: $result .= &Apache::edit::editline('',$text,'',60);
1396: } elsif ($target eq 'modified') {
1397: $result.=&Apache::edit::rebuild_tag($token);
1398: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1399: }
1400: return $result;
1401: }
1402:
1403: sub end_ylabel {
1404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1405: my $result = '';
1406: if ($target eq 'web' || $target eq 'tex') {
1407: } elsif ($target eq 'edit') {
1408: $result.=&Apache::edit::tag_end($target,$token);
1409: }
1410: return $result;
1411: }
1412:
1413: ##------------------------------------------------------------------- label
1414: sub start_label {
1415: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1416: my $result='';
1417: if ($target eq 'web' || $target eq 'tex') {
1418: my %label;
1419: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1420: $tagstack->[-1]);
1421: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1422: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1423: $text =~ s/\n/ /g;
1424: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
1425: $label{'text'} = &parse_label($target,$text);
1426: push(@labels,\%label);
1427: } elsif ($target eq 'edit') {
1428: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1429: $result .= &edit_attributes($target,$token,\%label_defaults);
1430: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1431: $result .= &Apache::edit::end_row().
1432: &Apache::edit::start_spanning_row().
1433: &Apache::edit::editline('',$text,'',60);
1434: } elsif ($target eq 'modified') {
1435: &Apache::edit::get_new_args
1436: ($token,$parstack,$safeeval,keys(%label_defaults));
1437: $result.=&Apache::edit::rebuild_tag($token);
1438: $result.=&Apache::edit::modifiedfield("/label",$parser);
1439: }
1440: return $result;
1441: }
1442:
1443: sub end_label {
1444: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1445: my $result = '';
1446: if ($target eq 'web' || $target eq 'tex') {
1447: } elsif ($target eq 'edit') {
1448: $result.=&Apache::edit::tag_end($target,$token);
1449: }
1450: return $result;
1451: }
1452:
1453: ##------------------------------------------------------------------- curve
1454: sub start_curve {
1455: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1456: my $result='';
1457: &Apache::lonxml::register('Apache::lonplot',('function','data'));
1458: push (@Apache::lonxml::namespace,'curve');
1459: if ($target eq 'web' || $target eq 'tex') {
1460: my %curve;
1461: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1462: $tagstack->[-1]);
1463: push (@curves,\%curve);
1464: } elsif ($target eq 'edit') {
1465: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1466: $result .= &edit_attributes($target,$token,\%curve_defaults,
1467: \@curve_edit_order)
1468: .&Apache::edit::end_row()
1469: .&Apache::edit::start_spanning_row();
1470:
1471: } elsif ($target eq 'modified') {
1472: my $constructtag=&Apache::edit::get_new_args
1473: ($token,$parstack,$safeeval,keys(%curve_defaults));
1474: if ($constructtag) {
1475: #
1476: # Fix up the color attribute as jcolor does not prepend an x
1477: #
1478: my $value = $token->[2]{'color'};
1479: if (defined $value && !($value =~ /^x/)) {
1480: $token->[2]{'color'} = 'x' . $value;
1481: }
1482: $result = &Apache::edit::rebuild_tag($token);
1483: }
1484: }
1485: return $result;
1486: }
1487:
1488: sub end_curve {
1489: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1490: my $result = '';
1491: pop @Apache::lonxml::namespace;
1492: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1493: if ($target eq 'web' || $target eq 'tex') {
1494: } elsif ($target eq 'edit') {
1495: $result.=&Apache::edit::tag_end($target,$token);
1496: }
1497: return $result;
1498: }
1499:
1500: ##------------------------------------------------------------ curve function
1501: sub start_function {
1502: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1503: my $result='';
1504: if ($target eq 'web' || $target eq 'tex') {
1505: if (exists($curves[-1]->{'data'})) {
1506: &Apache::lonxml::warning
1507: ('Use of the <b>curve function</b> tag precludes use of '.
1508: ' the <b>curve data</b> tag. '.
1509: 'The curve data tag will be omitted in favor of the '.
1510: 'curve function declaration.');
1511: delete $curves[-1]->{'data'} ;
1512: }
1513: my $function = &Apache::lonxml::get_all_text("/function",$parser,
1514: $style);
1515: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
1516: $function=~s/\^/\*\*/gs;
1517: $function=~ s/^\s+//; # Trim leading
1518: $function=~ s/\s+$//; # And trailing whitespace.
1519: $curves[-1]->{'function'} = $function;
1520: } elsif ($target eq 'edit') {
1521: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1522: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1523: $result .= &Apache::edit::editline('',$text,'',60);
1524: } elsif ($target eq 'modified') {
1525: $result.=&Apache::edit::rebuild_tag($token);
1526: $result.=&Apache::edit::modifiedfield("/function",$parser);
1527: }
1528: return $result;
1529: }
1530:
1531: sub end_function {
1532: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1533: my $result = '';
1534: if ($target eq 'web' || $target eq 'tex') {
1535: } elsif ($target eq 'edit') {
1536: $result .= &Apache::edit::end_table();
1537: }
1538: return $result;
1539: }
1540:
1541: ##------------------------------------------------------------ curve data
1542: sub start_data {
1543: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1544: my $result='';
1545: if ($target eq 'web' || $target eq 'tex') {
1546: if (exists($curves[-1]->{'function'})) {
1547: &Apache::lonxml::warning
1548: ('Use of the <b>curve function</b> tag precludes use of '.
1549: ' the <b>curve data</b> tag. '.
1550: 'The curve function tag will be omitted in favor of the '.
1551: 'curve data declaration.');
1552: delete($curves[-1]->{'function'});
1553: }
1554: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1555: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1556: # Deal with cases where we're given an array...
1557: if ($datatext =~ /^\@/) {
1558: $datatext = &Apache::run::run('return "'.$datatext.'"',
1559: $safeeval,1);
1560: }
1561: $datatext =~ s/\s+/ /g;
1562: # Need to do some error checking on the @data array -
1563: # make sure it's all numbers and make sure each array
1564: # is of the same length.
1565: my @data;
1566: if ($datatext =~ /,/) { # comma deliminated
1567: @data = split /,/,$datatext;
1568: } else { # Assume it's space separated.
1569: @data = split / /,$datatext;
1570: }
1571: for (my $i=0;$i<=$#data;$i++) {
1572: # Check that it's non-empty
1573: if (! defined($data[$i])) {
1574: &Apache::lonxml::warning(
1575: 'undefined curve data value. Replacing with '.
1576: ' pi/e = 1.15572734979092');
1577: $data[$i] = 1.15572734979092;
1578: }
1579: # Check that it's a number
1580: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1581: &Apache::lonxml::warning(
1582: 'Bad curve data value of '.$data[$i].' Replacing with '.
1583: ' pi/e = 1.15572734979092');
1584: $data[$i] = 1.15572734979092;
1585: }
1586: }
1587: # complain if the number of data points is not the same as
1588: # in previous sets of data.
1589: if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
1590: &Apache::lonxml::warning
1591: ('Number of data points is not consistent with previous '.
1592: 'number of data points');
1593: }
1594: push @{$curves[-1]->{'data'}},\@data;
1595: } elsif ($target eq 'edit') {
1596: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1597: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1598: $result .= &Apache::edit::editline('',$text,'',60);
1599: } elsif ($target eq 'modified') {
1600: $result.=&Apache::edit::rebuild_tag($token);
1601: $result.=&Apache::edit::modifiedfield("/data",$parser);
1602: }
1603: return $result;
1604: }
1605:
1606: sub end_data {
1607: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1608: my $result = '';
1609: if ($target eq 'web' || $target eq 'tex') {
1610: } elsif ($target eq 'edit') {
1611: $result .= &Apache::edit::end_table();
1612: }
1613: return $result;
1614: }
1615:
1616: ##------------------------------------------------------------------- axis
1617: sub start_axis {
1618: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1619: my $result='';
1620: if ($target eq 'web' || $target eq 'tex') {
1621: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1622: $tagstack->[-1]);
1623: } elsif ($target eq 'edit') {
1624: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1625: $result .= &edit_attributes($target,$token,\%axis_defaults,
1626: \@axis_edit_order);
1627: } elsif ($target eq 'modified') {
1628: my $constructtag=&Apache::edit::get_new_args
1629: ($token,$parstack,$safeeval,keys(%axis_defaults));
1630:
1631: if ($constructtag) {
1632: #
1633: # Fix up the color attribute since jchooser does not
1634: # prepend an x to the color:
1635: #
1636: my $value = $token->[2]{'color'};
1637: if (defined $value && !($value =~ /^x/)) {
1638: $token->[2]{'color'} = 'x' . $value;
1639: }
1640:
1641: $result = &Apache::edit::rebuild_tag($token);
1642: }
1643: }
1644: return $result;
1645: }
1646:
1647: sub end_axis {
1648: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1649: my $result = '';
1650: if ($target eq 'web' || $target eq 'tex') {
1651: } elsif ($target eq 'edit') {
1652: $result.=&Apache::edit::tag_end($target,$token);
1653: } elsif ($target eq 'modified') {
1654: }
1655: return $result;
1656: }
1657:
1658: ###################################################################
1659: ## ##
1660: ## Utility Functions ##
1661: ## ##
1662: ###################################################################
1663:
1664: ##----------------------------------------------------------- set_defaults
1665: sub set_defaults {
1666: my ($var,$defaults) = @_;
1667: my $key;
1668: foreach $key (keys(%$defaults)) {
1669: $var->{$key} = $defaults->{$key}->{'default'};
1670: }
1671: }
1672:
1673: ##------------------------------------------------------------------- misc
1674: sub get_attributes{
1675: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1676: foreach my $attr (keys(%{$defaults})) {
1677: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1678: $values->{$attr} =
1679: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1680: } else {
1681: $values->{$attr} =
1682: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1683: }
1684: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1685: $values->{$attr} = $defaults->{$attr}->{'default'};
1686: next;
1687: }
1688: my $test = $defaults->{$attr}->{'test'};
1689: if (! &$test($values->{$attr})) {
1690: &Apache::lonxml::warning
1691: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1692: .$defaults->{$attr}->{'default'} );
1693: $values->{$attr} = $defaults->{$attr}->{'default'};
1694: }
1695: }
1696: return ;
1697: }
1698: ##
1699: # Generate tic mark specifications.
1700: #
1701: # @param type - type of tics (xtics or ytics).
1702: # @param spec - Reference to a hash that contains the tic specification.
1703: # @param target - 'tex' if hard copy target.
1704: #
1705: # @return string - the tic specification command.
1706: #
1707: sub generate_tics {
1708: my ($type, $spec, $target) = @_;
1709: my $result = '';
1710:
1711:
1712: if (defined %$spec) {
1713:
1714:
1715:
1716: # Major tics: - If there are 'ticspecs' these override any other
1717: # specifications:
1718:
1719:
1720:
1721: $result .= "set $type $spec->{'location'} ";
1722: $result .= ($spec->{'mirror'} eq 'on') ? 'mirror ' : 'nomirror ';
1723: if ($spec->{'rotate'} eq 'on') {
1724: $result .= ' rotate ';
1725: }
1726: if (defined $spec->{'ticspecs'}) {
1727: $result .= '( ';
1728: my @ticspecs;
1729: my $ticinfo = $spec->{'ticspecs'};
1730: foreach my $tic (@$ticinfo) {
1731: push(@ticspecs, '"' . $tic->{'label'} . '" ' . $tic->{'pos'} );
1732: }
1733: $result .= join(', ', (@ticspecs));
1734: $result .= ' )';
1735: } else {
1736: $result .= "$spec->{'start'}, ";
1737: $result .= "$spec->{'increment'}, ";
1738: $result .= "$spec->{'end'} ";
1739: }
1740: if ($target eq 'tex' ) {
1741: $result .= 'font "Helvetica,22"';
1742: }
1743: $result .= "\n";
1744:
1745: # minor frequency:
1746:
1747: if ($spec->{'minorfreq'} != 0) {
1748: $result .= "set m$type $spec->{'minorfreq'}\n";
1749: }
1750: } else {
1751: $result .= "set $type font " . '"Helvetica,22"' ."\n";
1752: }
1753:
1754:
1755: return $result;
1756: }
1757:
1758: ##------------------------------------------------------- write_gnuplot_file
1759: sub write_gnuplot_file {
1760: my ($tmpdir,$filename,$target)= @_;
1761: my ($fontsize, $font_properties) = &get_font($target);
1762: my $gnuplot_input = '';
1763: my $curve;
1764: #
1765: # Check to be sure we do not have any empty curves
1766: my @curvescopy;
1767: foreach my $curve (@curves) {
1768: if (exists($curve->{'function'})) {
1769: if ($curve->{'function'} !~ /^\s*$/) {
1770: push(@curvescopy,$curve);
1771: }
1772: } elsif (exists($curve->{'data'})) {
1773: foreach my $data (@{$curve->{'data'}}) {
1774: if (scalar(@$data) > 0) {
1775: push(@curvescopy,$curve);
1776: last;
1777: }
1778: }
1779: }
1780: }
1781: @curves = @curvescopy;
1782: # Collect all the colors
1783: my @Colors;
1784: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1785: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1786: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1787: foreach $curve (@curves) {
1788: push @Colors, ($curve->{'color'} ne '' ?
1789: $curve->{'color'} :
1790: $Apache::lonplot::plot{'fgcolor'} );
1791: }
1792:
1793: # set term
1794: if ($target eq 'web') {
1795: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1796: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1797: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1798: '/'.$font_properties->{'file'}.'.ttf" ';
1799: $gnuplot_input .= $fontsize;
1800: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1801: $gnuplot_input .= "@Colors\n";
1802: # set output
1803: $gnuplot_input .= "set output\n";
1804: } elsif ($target eq 'tex') {
1805: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} dash ";
1806: if (!$font_properties->{'tex_no_file'}) {
1807: $gnuplot_input .=
1808: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1809: '/'.$font_properties->{'file'}.'.pfb" ';
1810: }
1811: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1812: $gnuplot_input .= $fontsize;
1813: $gnuplot_input .= "\nset output \"".$tmpdir.
1814: &unescape($filename).".eps\"\n";
1815: $gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
1816:
1817: }
1818: $gnuplot_input .= "set encoding utf8\n";
1819: # cartesian or polar plot?
1820: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1821: $gnuplot_input .= 'set polar'.$/;
1822: } else {
1823: # Assume Cartesian
1824: }
1825: # cartesian or polar grid?
1826: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1827: $gnuplot_input .= 'set grid polar'.$/;
1828: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1829: $gnuplot_input .= 'set logscale x'.$/;
1830: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1831: $gnuplot_input .= 'set logscale y'.$/;
1832: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1833: $gnuplot_input .= 'set logscale x'.$/;
1834: $gnuplot_input .= 'set logscale y'.$/;
1835: } else {
1836: # Assume Cartesian
1837: }
1838: # solid or pattern for boxes?
1839: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1840: $gnuplot_input .= 'set style fill solid '.
1841: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1842: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1843: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1844: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1845: }
1846: # margin
1847: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1848: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1849: }
1850: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1851: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1852: }
1853: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1854: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1855: }
1856: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1857: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1858: }
1859:
1860: # tic scales
1861: if ($version > 4) {
1862: $gnuplot_input .= 'set tics scale '.
1863: $Apache::lonplot::plot{'major_ticscale'}.', '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1864: } else {
1865: $gnuplot_input .= 'set ticscale '.
1866: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1867: }
1868: #boxwidth
1869: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1870: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1871: }
1872: # gridlayer
1873: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1874: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1875:
1876: # grid
1877: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1878: # border
1879: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1880: 'set border'.$/ :
1881: 'set noborder'.$/ );
1882: # sampling rate for non-data curves
1883: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1884: # title, xlabel, ylabel
1885: # titles
1886: my $extra_space_x = ($xtics{'location'} eq 'axis') ? ' 0, -0.5 ' : '';
1887: my $extra_space_y = ($ytics{'location'} eq 'axis') ? ' -0.5, 0 ' : '';
1888:
1889: if ($target eq 'tex') {
1890: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($title)) ;
1891: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($xlabel));
1892: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y font \"".$font_properties->{'printname'}.",".$fontsize."pt\"\n" if (defined($ylabel));
1893: } else {
1894: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1895: $gnuplot_input .= "set xlabel \"$xlabel\" $extra_space_x \n" if (defined($xlabel));
1896: $gnuplot_input .= "set ylabel \"$ylabel\" $extra_space_y \n" if (defined($ylabel));
1897: }
1898: # tics
1899: $gnuplot_input .= &generate_tics('xtics', \%xtics, $target);
1900:
1901: $gnuplot_input .= &generate_tics('ytics', \%ytics, $target);
1902:
1903: # axis
1904: if (%axis) {
1905: if ($axis{'xformat'} ne 'on') {
1906: $gnuplot_input .= "set format x ";
1907: if ($axis{'xformat'} eq 'off') {
1908: $gnuplot_input .= "\"\"\n";
1909: } else {
1910: $gnuplot_input .= "\"\%.".$axis{'xformat'}."\"\n";
1911: }
1912: }
1913: if ($axis{'yformat'} ne 'on') {
1914: $gnuplot_input .= "set format y ";
1915: if ($axis{'yformat'} eq 'off') {
1916: $gnuplot_input .= "\"\"\n";
1917: } else {
1918: $gnuplot_input .= "\"\%.".$axis{'yformat'}."\"\n";
1919: }
1920: }
1921: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1922: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1923: if ($axis{'xzero'} ne 'off') {
1924: $gnuplot_input .= "set xzeroaxis ";
1925: if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
1926: $gnuplot_input .= "lt -1 ";
1927: if ($axis{'xzero'} eq 'thick-line') {
1928: $gnuplot_input .= "lw 3 ";
1929: }
1930: }
1931: $gnuplot_input .= "\n";
1932: }
1933: if ($axis{'yzero'} ne 'off') {
1934: $gnuplot_input .= "set yzeroaxis ";
1935: if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
1936: $gnuplot_input .= "lt -1 ";
1937: if ($axis{'yzero'} eq 'thick-line') {
1938: $gnuplot_input .= "lw 3 ";
1939: }
1940: }
1941: $gnuplot_input .= "\n";
1942: }
1943: }
1944: # Key
1945: if (%key) {
1946: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1947: if ($key{'title'} ne '') {
1948: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1949: }
1950: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1951: } else {
1952: $gnuplot_input .= 'set nokey'.$/;
1953: }
1954: # labels
1955: my $label;
1956: foreach $label (@labels) {
1957: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1958: $label->{'xpos'}.','.$label->{'ypos'};
1959: if ($label->{'rotate'} ne '') {
1960: $gnuplot_input .= ' rotate by '.$label->{'rotate'};
1961: }
1962: $gnuplot_input .= ' '.$label->{'justify'};
1963:
1964: if ($target eq 'tex') {
1965: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$fontsize.'pt"' ;
1966: }
1967: $gnuplot_input .= $/;
1968: }
1969: if ($target eq 'tex') {
1970: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1971: $gnuplot_input .="\n";
1972: }
1973: # curves
1974: #
1975: # Each curve will have its very own linestyle.
1976: # (This should work just fine in web rendition I think).
1977: # The line_xxx variables will hold the elements of the line style.
1978: # type (solid/dashed), color, width
1979: #
1980: my $linestyle_index = 50;
1981: my $line_width = '';
1982:
1983: # If arrows are needed there will be an arrow style for each as well:
1984: #
1985:
1986: my $arrow_style_index = 50;
1987:
1988: my $plot_command;
1989: my $plot_type;
1990:
1991: for (my $i = 0;$i<=$#curves;$i++) {
1992: $curve = $curves[$i];
1993: $plot_command.= ', ' if ($i > 0);
1994: if ($target eq 'tex') {
1995: $curve->{'linewidth'} *= 2;
1996: }
1997: $line_width = $curve->{'linewidth'};
1998: if (exists($curve->{'function'})) {
1999: $plot_type =
2000: $curve->{'function'}.' title "'.
2001: $curve->{'name'}.'" with '.
2002: $curve->{'linestyle'};
2003: } elsif (exists($curve->{'data'})) {
2004: # Store data values in $datatext
2005: my $datatext = '';
2006: # get new filename
2007: my $datafilename = "$tmpdir/$filename.data.$i";
2008: my $fh=Apache::File->new(">$datafilename");
2009: # Compile data
2010: my @Data = @{$curve->{'data'}};
2011: my @Data0 = @{$Data[0]};
2012: for (my $i =0; $i<=$#Data0; $i++) {
2013: my $dataset;
2014: foreach $dataset (@Data) {
2015: $datatext .= $dataset->[$i] . ' ';
2016: }
2017: $datatext .= $/;
2018: }
2019: # write file
2020: print $fh $datatext;
2021: close($fh);
2022: # generate gnuplot text
2023: $plot_type = '"'.$datafilename.'" title "'.
2024: $curve->{'name'}.'" with '.
2025: $curve->{'linestyle'};
2026: }
2027: my $pointtype = '';
2028: my $pointsize = '';
2029:
2030: # Figure out the linestyle:
2031:
2032: my $lt = $curve->{'linetype'} ne '' ? $curve->{'linetype'}
2033: : 'solid'; # Line type defaults to solid.
2034: # The mapping of lt -> the actual gnuplot line type depends on the target:
2035:
2036: if ($target eq 'tex') {
2037: $lt = $ps_linetypes{$lt};
2038: } else {
2039: $lt = $linetypes{$lt}
2040: }
2041:
2042: my $color = $curve->{'color'};
2043: $color =~ s/^x/#/; # Convert xhex color -> #hex color.
2044:
2045: my $style_command = "set style line $linestyle_index $pointtype $pointsize linetype $lt linewidth $line_width lc rgb '$color'\n";
2046: $gnuplot_input .= $style_command;
2047:
2048:
2049:
2050: if (($curve->{'linestyle'} eq 'points') ||
2051: ($curve->{'linestyle'} eq 'linespoints') ||
2052: ($curve->{'linestyle'} eq 'errorbars') ||
2053: ($curve->{'linestyle'} eq 'xerrorbars') ||
2054: ($curve->{'linestyle'} eq 'yerrorbars') ||
2055: ($curve->{'linestyle'} eq 'xyerrorbars')) {
2056:
2057: $pointtype =' pointtype '.$curve->{'pointtype'};
2058: $pointsize =' pointsize '.$curve->{'pointsize'};
2059: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
2060: $plot_command.= ' '.$curve->{'limit'};
2061: } elsif ($curve->{'linestyle'} eq 'vector') {
2062:
2063: # Create the arrow head style add it to
2064: # $gnuplot_input..and ensure it gets
2065: # Selected in the plot command.
2066:
2067: $gnuplot_input .= "set style arrow $arrow_style_index ";
2068: $gnuplot_input .= ' ' . $curve->{'arrowhead'};
2069: $gnuplot_input .= ' size ' . $curve->{'arrowlength'};
2070: $gnuplot_input .= ','.$curve->{'arrowangle'};
2071: $gnuplot_input .= ',' . $curve->{'arrowbackangle'};
2072: $gnuplot_input .= ' ' . $curve->{'arrowstyle'} . " ls $linestyle_index\n";
2073:
2074:
2075: $plot_command .= " arrowstyle $arrow_style_index ";
2076: $arrow_style_index++;
2077: }
2078:
2079:
2080:
2081:
2082: # The condition below is because gnuplot lumps the linestyle in with the
2083: # arrowstyle _sigh_.
2084:
2085: if ($curve->{'linestyle'} ne 'vector') {
2086: $plot_command.= " ls $linestyle_index";
2087: }
2088:
2089: $gnuplot_input .= 'plot ' . $plot_type . ' ' . $plot_command . "\n";
2090: $linestyle_index++; # Each curve get a unique linestyle.
2091: }
2092: # Write the output to a file.
2093:
2094: # &Apache::lonnet::logthis($gnuplot_input); # uncomment to log the gnuplot input.
2095: open (my $fh, "> $tmpdir$filename.data");
2096: binmode($fh, ':utf8');
2097: print $fh $gnuplot_input;
2098: close($fh);
2099: # That's all folks.
2100: return ;
2101: }
2102:
2103: #---------------------------------------------- check_inputs
2104: sub check_inputs {
2105: ## Note: no inputs, no outputs - this acts only on global variables.
2106: ## Make sure we have all the input we need:
2107: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
2108: if (! %key ) {} # No key for this plot, thats okay
2109: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
2110: if (! defined($title )) {} # No title for this plot, thats okay
2111: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
2112: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
2113: if ($#labels < 0) { } # No labels for this plot, thats okay
2114: if ($#curves < 0) {
2115: &Apache::lonxml::warning("No curves specified for plot!!!!");
2116: return '';
2117: }
2118: my $curve;
2119: foreach $curve (@curves) {
2120: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
2121: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
2122: return '';
2123: }
2124: }
2125: }
2126:
2127: #------------------------------------------------ make_edit
2128: sub edit_attributes {
2129: my ($target,$token,$defaults,$keys) = @_;
2130: my ($result,@keys);
2131: if ($keys && ref($keys) eq 'ARRAY') {
2132: @keys = @$keys;
2133: } else {
2134: @keys = sort(keys(%$defaults));
2135: }
2136: foreach my $attr (@keys) {
2137: # append a ' ' to the description if it doesn't have one already.
2138: my $description = $defaults->{$attr}->{'description'};
2139: $description .= ' ' if ($description !~ / $/);
2140: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
2141: $result .= &Apache::edit::text_arg
2142: ($description,$attr,$token,
2143: $defaults->{$attr}->{'size'},
2144: $defaults->{$attr}->{'class'});
2145: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
2146: $result .= &Apache::edit::select_or_text_arg
2147: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
2148: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
2149: $result .= &Apache::edit::select_or_text_arg
2150: ($description,$attr,['on','off'],$token);
2151: }
2152: $result .= '<br />';
2153: }
2154: return $result;
2155: }
2156:
2157:
2158: ###################################################################
2159: ## ##
2160: ## Insertion functions for editing plots ##
2161: ## ##
2162: ###################################################################
2163:
2164: sub insert_gnuplot {
2165: my $result = '';
2166: # plot attributes
2167: $result .= "\n<gnuplot ";
2168: foreach my $attr (keys(%gnuplot_defaults)) {
2169: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
2170: }
2171: $result .= ">";
2172: # Add the components (most are commented out for simplicity)
2173: # $result .= &insert_key();
2174: # $result .= &insert_axis();
2175: # $result .= &insert_title();
2176: # $result .= &insert_xlabel();
2177: # $result .= &insert_ylabel();
2178: $result .= &insert_curve();
2179: # close up the <gnuplot>
2180: $result .= "\n</gnuplot>";
2181: return $result;
2182: }
2183:
2184: sub insert_tics {
2185: my $result;
2186: $result .= &insert_xtics() . &insert_ytics;
2187: return $result;
2188: }
2189:
2190: sub insert_xtics {
2191: my $result;
2192: $result .= "\n <xtics ";
2193: foreach my $attr (keys(%tic_defaults)) {
2194: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2195: }
2196: $result .= "/>";
2197: return $result;
2198: }
2199:
2200: sub insert_ytics {
2201: my $result;
2202: $result .= "\n <ytics ";
2203: foreach my $attr (keys(%tic_defaults)) {
2204: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
2205: }
2206: $result .= "/>";
2207: return $result;
2208: }
2209:
2210: sub insert_key {
2211: my $result;
2212: $result .= "\n <key ";
2213: foreach my $attr (keys(%key_defaults)) {
2214: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
2215: }
2216: $result .= " />";
2217: return $result;
2218: }
2219:
2220: sub insert_axis{
2221: my $result;
2222: $result .= "\n <axis ";
2223: foreach my $attr (keys(%axis_defaults)) {
2224: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
2225: }
2226: $result .= " />";
2227: return $result;
2228: }
2229:
2230: sub insert_title { return "\n <title></title>"; }
2231: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
2232: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
2233:
2234: sub insert_label {
2235: my $result;
2236: $result .= "\n <label ";
2237: foreach my $attr (keys(%label_defaults)) {
2238: $result .= "\n $attr=\"".
2239: $label_defaults{$attr}->{'default'}."\"";
2240: }
2241: $result .= "></label>";
2242: return $result;
2243: }
2244:
2245: sub insert_curve {
2246: my $result;
2247: $result .= "\n <curve ";
2248: foreach my $attr (keys(%curve_defaults)) {
2249: $result .= "\n $attr=\"".
2250: $curve_defaults{$attr}->{'default'}."\"";
2251: }
2252: $result .= " >";
2253: $result .= &insert_data().&insert_data()."\n </curve>";
2254: }
2255:
2256: sub insert_function {
2257: my $result;
2258: $result .= "\n <function></function>";
2259: return $result;
2260: }
2261:
2262: sub insert_data {
2263: my $result;
2264: $result .= "\n <data></data>";
2265: return $result;
2266: }
2267:
2268: ##----------------------------------------------------------------------
2269: 1;
2270: __END__
2271:
2272:
2273: =head1 NAME
2274:
2275: Apache::lonplot.pm
2276:
2277: =head1 SYNOPSIS
2278:
2279: XML-based plotter of graphs
2280:
2281: This is part of the LearningOnline Network with CAPA project
2282: described at http://www.lon-capa.org.
2283:
2284:
2285: =head1 SUBROUTINES (parsing and edit rendering)
2286:
2287: =over
2288:
2289: =item start_gnuplot()
2290:
2291: =item end_gnuplot()
2292:
2293: =item start_xtics()
2294:
2295: =item end_xtics()
2296:
2297: =item start_ytics()
2298:
2299: =item end_ytics()
2300:
2301: =item get_font()
2302:
2303: =item start_key()
2304:
2305: =item end_key()
2306:
2307: =item parse_label()
2308:
2309: =item replace_entities()
2310:
2311: =item start_title()
2312:
2313: =item end_title()
2314:
2315: =item start_xlabel()
2316:
2317: =item end_xlabel()
2318:
2319: =item start_ylabel()
2320:
2321: =item end_label()
2322:
2323: =item start_curve()
2324:
2325: =item end_curve()
2326:
2327: =item start_function()
2328:
2329: =item end_function()
2330:
2331: =item start_data()
2332:
2333: =item end_data()
2334:
2335: =item start_axis()
2336:
2337: =item end_axis
2338:
2339: =back
2340:
2341: =head1 SUBROUTINES (Utility)
2342:
2343: =over
2344:
2345: =item set_defaults()
2346:
2347: =item get_attributes()
2348:
2349: =item write_gnuplot_file()
2350:
2351: =item check_inputs()
2352:
2353: =item edit_attributes()
2354:
2355: =back
2356:
2357: =head1 SUBROUTINES (Insertion functions for editing plots)
2358:
2359: =over
2360:
2361: =item insert_gnuplot()
2362:
2363: =item insert_tics()
2364:
2365: =item insert_xtics()
2366:
2367: =item insert_key()
2368:
2369: =item insert_axis()
2370:
2371: =item insert_title()
2372:
2373: =item insert_xlabel()
2374:
2375: =item insert_ylabel()
2376:
2377: =item insert_label()
2378:
2379: =item insert_curve()
2380:
2381: =item insert_function()
2382:
2383: =item insert_data()
2384:
2385: =back
2386:
2387: =cut
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